Standalone .WAV answering machine?

Ok this sounds bizaare from the get-go, but I was wondering about computer-independent answering machines (that you connect to your regular phone line) that store the messages in .wav files, that maybe I can plug into my computer with a USB connection. Am I dreaming or is there something like this out there?

From their website:
EzVoice v3.0, released on February 7th, 2005, is full-featured answering machine software that picks up calls for you while you are away. It captures caller id, and allows you to pre-screen and block unwanted calls or telemarketers. Its built-in address book let you customize greetings for all your friends, relatives or co-workers. Moreover, it will notify you of new calls or voice messages through emails to your pagers or cellular phones. If you own a business, you can set up to 10 voice mailboxes in EzVoice, which enable you to announce product, price or other related information in separate mail boxes. This will greatly improve your business images. Additionally, you can attach memos or notes to your phone messages. With built-in search tool, you can retrieve and find these messages quickly. EzVoice further provides other useful features such as visual and audio alert upon new calls, password protected remote retrieval, unlimited recording length and so on.

Thanks for all the info. The problem is that I have a laptop, so if I take it anywhere, there goes my answering machine. I do have a desktop sitting here, but I was going to put Fedora 3 (or 4 by the time I get around to it) on the machine, so...and configuring mGetty is a pain in the ****!!